Steam-boiler



N 0 S .S L I N P G.

STEAM BOILER.

Patented June 23, 1896.

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(No Model.) 3 Sheets-Sheet 2.

G. I'. NILSSON.

STEAM BUTLER.

Patented June 23, 1896.

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(No Model.)

G. F. NILSSON. STEAM BOILER.

Patented June 423, 1896.

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GEORGE NILSSON, OF W'HITINSVILLE, MASSACHUSETTS.

STEAM- BOILER.

SPECIFICATION forming part 'of Letters Patent No. 562,736, dated 'J une23, 1896. Application filed October '7, 1895. Serial No. 564,942. (Nomodel.)

To ali whom it may concern.-

Beit known that I, GEORGE F. NILssON, of lVhitinsville, in the county ofVorcester, State of Massachusetts, have made certain new and usefulImprovements in Steam-Boilers, of which the following is a descriptionsufficiently ifull, clear, and exa-ct to enable any person skilled inthe art or science to which said invention appertains to make and usethe same, reference being had to the accompan ying drawings, forming apart of this specification, in which- Figure lis a front elevation of myimproved boiler; Fig. 2, a side elevation of the same; Fig.' 3, avertical transverse section taken on line c c in Fig. 2; Fig. 4, avertical longitudinal section of the boiler; Fig. 5, an elevationshowing the outer end of one of the couplings, the body of the boilerbeing broken olf; Fig. G, a vertical section on line 2j y in Fig.

5; Fig. 7, a sectional View, and Fig. 8 a plan I view, showing a form ofcoupling adapted for use at the top of the boiler; Fig. 9, a top planvview of my improved boiler in horizontal form; Fig. l0, a sideelevation ol the same; and Fig. 1l, a vertical section of the steamdome,showing the method of attaching.

Like letters and numerals of reference indicate corresponding parts inthe different figures of the drawings.

My invention relates to improvements in boilers particularly adapted foruse in hotwater and steam heating and is an additional inventionrelating to the boiler shown in my United States Letters Patent No.517,143, dated March 27, 1894.

The especial object of this invention is to obtain the maximum amount ofsteam for the quantity of fuel consumed and to lessen the cost ofconstruction, the peculiarities of which admit of the entire casingbeing cast.

In carrying out my improvements I make use of means which will bereadily understood by all conversant with such matters from thefollowing explanation.

In the drawings7 A represents the fire-box, and B the ash-pit. The boxis rectangular, preferably, and is provided with a waterjacket t at thefront. The door f opens through the water-jacket. On said jacket thereare lugs 81, upon which the grate g is supported. The door l) of theash-pit is pivoted to swing vertically. At the rear of the tire-box ajacket h is vertically arranged. The shape of this jacket is best shownin Fig. 3, its inner wall being cut away to form the space c'. A seriesof horizontal circulation-pipes It* connect the jackets 7i t. Thesepipes have one end threaded and turned into the inner wall of the jackett before the rear jacket 7L is adjusted. Onto the opposite end of thepipe an ordinary coupling-ring 19 is turn ed. The walls of the jacket 7Lare tapped at 23, to coincide with the threads 24' of the ring 19. (SeeFig. G.) The coupling-heads D for securing the other ends of the pipesto the jackets are a salient feature of my invention. The opening 22 isof greater diameter than the opening 23. Said coupling D has a threadedshank, which will pass readily through the opening 22 and turn into theopening 23 in the inner wall of the jacket and into the eouplin g-rin g1f). At the inner end ot' said shank there is a shoulder S3, whichengages said inner wall. The head of the coupling D is solid andthreaded to it the opening 22 in the outer wall of the jacket. Said headhas a squared projection 2l to receive a wrench. Ports 25 in thecoupling open into the jacket and permit flow therefrom to the pipes 7o.By this means the jackets and pipes are firmly secured together.

The sides of the box comprise jackets q, of cast metal, the walls ot'which are connected by braces 62. (See Fig. A similar hori-Zontally-arranged jacket w forms the top an d are all connected togetherby couplings D7 as shown in Figs. 2 and 4. The inlet d enters the rearjacket h. A short horizontal jacket t' overlaps the top of said rearjacket, its outer end bein g supported by a post This jacket has hollowoval projections 30, into a wall of which the connecting-coupling D isturned and through which the circulation takes place. The verticalportion C of the boiler forms the `flue and is constructed of jackets y,of the form described, which are respectively secured together. Thesejackets have their walls connected by braces 62, cast integraltherewith, as described for the other jackets. The rear vertical jackety rests on the post 24, and is connected to the jacket o by coup- IDOling D and hollow projection 30. The front jacket y is connected in likemanner with the jacket w. Each side jacket has a door fr, through whichthe flue may be cleaned. The nipple e' for the funnel opens into the topof the flue. The top of the flue C is closed by a jacket 16, connected`in the same manner as the others. A series of pipes p2 are arrangedhorizontally over the fire-box, one end of said pipes being turned intothe wall of the jacket i. Ordinary elbow-couplings are turned onto theinner ends of these pipes, and

vertical pip es p3, secu red therein pass throughv the flue C andconnect with the jacket 16, either bycoupling D or the forni 17. (Shownin Figs. 7 and 8.) The hot water is taken from the jacket 16 by nipples15, each of said nipples registering with one of the flue-pipes. Forsuch it is `iinpraeticable to use the coupling D, so I employ with thering 19 a coupling-tube 17, exteriorly threaded to turn into the innerwall of said jacket and into said ring. rlhis tube has inwardlyprojecting flanges 18 to receive a tool for rotating' the tube.

The lire from the grate contacts directly with the pipes in the box andline and also with the jackets, affording a far greater heating-surfacethan is usual in boilers of this size. amount of water, only enough toprotect the heating-surfaces being necessary. By my peculiar arrangementfor connecting the parts I am enabled to greatly reduce the cost ofconstruction, as all the jackets can be cast whole and easily connectedby the'couplings described. These couplings effect great saying of timein assembling the parts, as all the difficulties incident to the use ofright and left couplings are avoided.

If preferred, the vertical jackets y may be dispensed with and the flueformed of brick, the action of the boiler being substantially as good.

lVhen used for steam, I preferably employ the forni shown in Figs. 9,10, and 11. The vertical flue C is substituted by a horizontal one F,supported by a leg 2i, and ,into which the inlet CZ enters. Theconnections are made in the same manner as before.

A steam-dome G is mounted on the top-of the main body of the boiler andis connected with the jackets w t by a special coupling 60. Thiscoupling comprises a tube threaded to enter the walls of said jacketsand having ports 6l,opcninginto the jacket w. Said coupsation is quietand there will be no circulai tion through the glass. Steam is takenfrom This enables me to employ a very smallv the top of the dome andthere is a nipple for attaching a pipe.

The operation of the boileris substantially l the same as for thehot-water form described. A circulation-pipe 52 connects the bottom ofthe dome with the bottom 'of the rear jacket h. The rear section E ofthis form may be omitted if desired and the jacket h extended to formtherear wall of the boiler.

Having thus explained my invention, what I claim is- 1. In a boilerajacket as, h, having screwthreaded openings in its walls in alinement,the opening in the outer wall being' of greater diameter than that inthe inner wall, in conibination with a coupling, D, havin g a threadedshank fit-ted to passfreely through the outer opening and be turned intothe inner opening and a threaded head fitted to turn into and close theouter opening, said coupling having a port opening-into said jacketsubstantially as described.

2. Inaboiler the coupling, D, having ports, f,

25, shoulder, 83, and threaded portions, 22, and, 23, of differentdiameters substantially as and for the purpose specified.

3. In a boiler aiire-pot; water-jackets surrounding said pot, saidjackets being cast integral; and screw-couplings connecting said jacketssaid couplings being exteriorly screwthreadedat both ends, the outer endbeing of greater diameter whereby they are adapted to be applied throughthe outer wall of the jackets and permit circulation therethroughsubstantially as specified.

4. In a boiler the jackets, 7L, i, in combination with the pipes, 7c,having an end turned into one of said jackets their opposite ends Ybeing connected with the opposite jacket by a coupling-rin g, 19, andcoupling, D, having the threaded portions of different diameterssubstantially as set forth.

5. In a boiler the jacket, 16, having nipple, 15, in combination withthepipe, p3, the ring, 19, and the coupling-tube, 17, turned into said ringand jacket all being arranged to operate substantially as set forth.

6. In a boiler the dome, G, having the bottoni, 56, `forming the space,59, the jacket, u', and the coupling 60, all being combined and arrangedto operate as set forth.

7. In a boiler a jacket as, r, provided with a hollow projection, 30,fitted to receive a coupling, D, whereby it may be connected to asimilar jacket substantially as and for the purpose set forth.

8. In a boiler the dome, G, having the bottom, 56, forming space, 57, incombination with a water-jacket connected with the boilerflow and acoupling tapping said jacket and said bottom centrally substantially asshown and described.

GEORGE F. NILSSON.

Vitnesses:

O. M. SHAW, C. M. WILBUR.

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